EP 1800740 B1 20211208 - Method for manufacturing water-absorbing resin
Title (en)
Method for manufacturing water-absorbing resin
Title (de)
Verfahren zur Herstellung von wasserabsorbierendem Harz
Title (fr)
Méthode de préparation d'une résine absorbant l'eau
Publication
Application
Priority
- JP 2005370858 A 20051222
- JP 2006193318 A 20060713
Abstract (en)
[origin: EP1800740A2] A method for surface crosslinking water-absorbing resin of the present invention includes a step (1) of obtaining a wet mixture, a step (2) of obtaining a dried particulate composition, and a step (3) of carrying out a surface crosslinking reaction. With this, since a processing time of each step becomes short, it is possible to mass produce the water-absorbing resin having excellent physical properties. Moreover, a method for manufacturing the water-absorbing resin of the present invention includes a modifying step and a cooling step. The modifying step and/or the cooling step are/is carried out by using stirring means including a rotation axis (70) having a plurality of stirring boards (80b), and the stirring means includes the stirring board (90b) having a specific thickness and/or a scraping blade having a specific shape. With this, it is possible to suppress the generation of the fine powder in the modifying step and/or the cooling step.
IPC 8 full level
B01J 8/10 (2006.01); B01F 27/73 (2022.01); C08J 3/12 (2006.01); C08J 3/20 (2006.01); C08J 3/24 (2006.01)
CPC (source: EP US)
B01F 27/115 (2022.01 - EP US); B01F 27/1152 (2022.01 - EP US); B01F 27/73 (2022.01 - EP US); B01J 8/10 (2013.01 - EP US); C08J 3/245 (2013.01 - EP US); B01J 2208/00212 (2013.01 - EP US); B01J 2208/00867 (2013.01 - EP US); B01J 2219/182 (2013.01 - EP US); Y10S 524/916 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE
DOCDB simple family (publication)
EP 1800740 A2 20070627; EP 1800740 A3 20071226; EP 1800740 B1 20211208; CN 1995103 A 20070711; CN 1995103 B 20120509; EP 2269720 A1 20110105; TW 200726793 A 20070716; TW I377222 B 20121121; US 2007149760 A1 20070628; US 7851550 B2 20101214
DOCDB simple family (application)
EP 06026348 A 20061219; CN 200610171193 A 20061221; EP 10176778 A 20061219; TW 95147233 A 20061215; US 64188506 A 20061220